Controlling Access to an In-Vehicle Human-Machine Interface

1. A system for a vehicle, comprising: at least one electrocardiogram sensor; and a computer comprising a processor and a memory, wherein the computer is programmed to: determine that data from the at least one electrocardiogram sensor is from a driver of the vehicle; detect the driver as distinguished from a passenger based on the data from the at least one electrocardiogram sensor; based on the data from the at least one electrocardiogram sensor, determine that the driver's hands are in at least one predetermined location in the vehicle, the at least one predetermined location including a location on a steering wheel; determine that the passenger is in a safe position with respect to a human-machine interface; and provide passenger access to the human-machine interface such that the passenger may access operations of the computer that are inaccessible to the driver.

2. The system of claim 1 , wherein the at least one predetermined location further includes a vehicle gearshift knob.

3. The system of claim 1 , further comprising at least one capacitive sensor arranged to assist in locating at least one of the driver's hands.

4. The system of claim 3 , wherein determining that the driver's hands are at the at least one predetermined location includes determining that palms and fingers of both of the driver's hands are on the steering wheel.

5. The system of claim 1 , further comprising a sensor in a display of the human machine interface arranged to provide data concerning a location of at least one of the driver's hands.

6. The system of claim 1 , wherein the computer is further programmed to perform a validation to determine whether signals from the at least one electrocardiogram sensors represent a human heartbeat.

7. The system of claim 1 , further comprising a plurality of second sensors to provide the inputs for determining whether the passenger is in the safe position, and wherein the second sensors include at least one of a weight sensor, a camera, and a sensor included in an occupant classification system (OCS).

8. The system of claim 1 , wherein the computer is further programmed to: determine that the driver is coaching the passenger with respect to operation of the human-machine interface; and revoke the passenger's access to the operations of the computer that are inaccessible to the driver.

9. The system of claim 1 , wherein the human-machine interface includes at least one of a visual display, a touchscreen, a speaker, and a microphone.

10. The system of claim 1 , wherein the safe position includes the passenger being spaced from the human-machine interface at least by a specified distance.

11. A method, comprising: determining that data from at least one electrocardiogram sensor is from a driver of a vehicle; detecting the driver as distinguished from a passenger based on the data from the at least one electrocardiogram sensor; determining, based on the data from the at least one electrocardiogram sensor, that the driver's hands are in at least one predetermined location in the vehicle, the at least one predetermined location including a location on a steering wheel; determining that the passenger is in a safe position with respect to a human-machine interface; and providing passenger access to the human-machine interface such that the passenger may access operations of a computer that are inaccessible to the driver.

12. The method of claim 11 , wherein the at least one predetermined location further includes a vehicle gearshift knob.

13. The method of claim 12 , further comprising receiving data from at least one capacitive sensor to assist in locating at least one of the driver's hands.

14. The method of claim 13 , wherein determining that the driver's hands are at the at least one predetermined location includes determining that palms and fingers of both of the driver's hands are on the steering wheel.

15. The method of claim 12 , further comprising receiving data from a sensor in a display of the human machine interface to assist in locating at least one of the driver's hands.

16. The method of claim 12 , further comprising performing a validation to determine whether signals from the at least one electrocardiogram sensors represent a human heartbeat.

17. The method of claim 11 , wherein a plurality of second sensors provide the inputs for determining whether the passenger is in the safe position, and wherein the second sensors include at least one of a weight sensor, a camera, and a sensor included in an occupant classification system (OCS).

18. The method of claim 11 , further comprising: determining that the driver is coaching the passenger with respect to operation of the human-machine interface; and revoking the passenger's access to the operations of the computer that are inaccessible to the driver.

19. The method of claim 11 , wherein the human-machine interface includes at least one of a visual display, a touchscreen, a speaker, and a microphone.

20. The method of claim 11 , wherein the safe position includes the passenger being spaced from the human-machine interface at least by a specified distance.